Publication of final Rebidding and Technical Parameters Guideline

On 25 September 2009, the Australian Energy Regulator (AER) published the final Rebidding and Technical Parameters Guideline.

The Guideline outlines the detail that must be contained in a rebid reason submitted to the Australian Energy Market Operator (AEMO). In addition, it covers several related areas associated with the bidding and rebidding of technical parameters.

Five changes have been adopted in the final Guideline, as follows:

1. the impact that legal operating requirements (eg. environmental limits) can have on minimum operating levels has been recognised
2. the requirement to include an estimate of the duration of a below minimum ramp rate or inflexibility has been removed if this information is inherent in other data provided with the offer or rebid
3. in situations where a rebid is submitted in response to a series of events, the 'most significant’ of the series must be provided in the rebid reason, replacing the ‘first event’ that was included in the draft Guideline
4. ramp rates in offers and rebids need only be brought into line with Supervisory Control And Data Acquisition (SCADA) ramp rate values in circumstances where dispatch would be impacted
5. minor wording change to clarify that when a ramp rate is rebid, it only has effect from the next dispatch interval.

The AER recognises that compliance with the new Guideline will require a change to the business practices of many participants. Following consultation with the NGF, the AER has determined that the new Guideline will be effective from 1 December 2009.

On 1 December 2009 the Guideline will replace the existing ‘Rebidding: Guidelines on the disclosure of information’ published by the National Electricity Code Administrator in July 2001.

Enquiries on the new Guideline can be sent electronically to: aerinquiryaer [dot] gov [dot] au (aerinquiry[at]aer[dot]gov[dot]au), or by mail to: